Aniline-black



WILLIAM T. NHITEHEAD, OF M AGOG, CANADA, ASSIGN'OR OF OltlE-HALF TO HENRY Di DUPEE, OF BOSTON, MASSACHUSETTS.

ANlLlNE-BLAGK- E$PECIFICATION forming port of Letters Patent No. 499,68 dated June 1.3, H393. Application filed January 16 1893. Serielll'c. $53,581; (We specimens.)

To aZZ whom it may concern:

Be it known that LWILLIA-M 'l. W HITEHEAD, a subject of the Queen of Great Britain, residing at Magog, Province of Quebec, Dominion of Canada, have invented an Improvement in known recipes therefor.

'l he cloth is then dried sufficiently to prevent the color from manner. veloped by or spreading, and hen print the patterns themi my improved discharge, in the usual The aniline-black is thereafter depassing the cloth through an aniline aging machine, or by steaming, w' h or 25 Without pressure; If desired, the cloth may he seeped, dried and finished in usual man- During the. process of developing the an ne-hlack color, the portions of the cloth covered by the discharge throw off the black ground color, and the finished cloth presents the pattern out 1) be white, I

urring or clouding.

clearly and sharply defined, withv If the pattern is to make the discharge mixture by taking six pounds, more or less, of a zinc compound, as for instance, oxide, hydrate or honate of zinc, to supply zinc, the essential or active element of the discharge; one-half gallon oi Water; and one and one-hull gallons of tarch 1):

--,e{one pen ml of starch perguilon}.

. o The zinc nnpouutl and the Water are thoroughly mixed, and the starch paste all to give the requisite tliiclcn for This discha in any well ing.

. 5 pattern to he dye-wood elf berry cxti discharge mixture. '1

essential -1 and whit dcd. r gor prin i.-

g 'c is ornate known manner, in the {13.7% if the part? "1 or fig d pigment color :3 al iitr color oi, is added tothe zinc, which is the ctivo'eienicnt of the discharge,

.s supplied by the zinc EIZWBPOHSEQ tends to fastener fix the-color, but it may he still further fastened by adding albumen to the mixture in such quantity and proportion as the nature of the particular case demands.

In the use of a pigment color,l use four quarts gn ill tragacztnth sol ution (three ounces per gallon) in theloregoing mixture instead of the starch paste, a thickener, and after the zinc compound and Water have been thoroughly mixed add the tl'iiekencr and the color, the quantity of the latter varying according to the depth of the shade desired and the nature oi the pigment itself. In using ultrainarine blue, for instance, I take about six pounds thereof for the mixture desc *ibed. The color may he produced from a coal-tar color, for instance safranine, and I then take six pounds or zinc compound; one end one-eighth gallons of water; one and. one-half poundssiaroh; and nine unces safreuine, mix tl'ioroughly and boil, Any one of too coal-tar colors having the property of fixing itself to the fabric when used in combination with a zinccoiupound maybe oniployeihsuch Bismarck brown, methyl blue, methyl vio- 75, let, rise.

l have found in my experiments that mo t of the sac-called hnsie colors will iix properly with zinc compound as the essential or active element of the discharge, out some of the So acid colors, such as soluble blue and. violet, and acid magenta, fail to properly fix with the oxide and. produce good results. To produce the color from d ye-wcod or her 1 extract,

1 may take, for instance, six pounds ot a zinc compound and thoroughly mix it with one and one-half gallons of Water, adding thereto three pints Persian berry extract, 48" Twaddle, a sutlic-ient amount of starch to produce a good. impression on the cloth, end one pint go chrome acetate, mixing all the ingredients well togc tlier, varying the quantity oi" Persian berry according to the shade desiredv tre is of lcgwood, sapzin, fustic, quercitrou,

earn may be used to produce other colors. 9 i i have p, 'culnrly specified oxide,

hydrate and carbonate of zinc under the term zine compound, i do not desire to be r stricted While'oxide of zinc is preterred .1 use, as cont..,, the esseir roe tial er'active element of the discharge, any zin'hompound may be employed with good resmts, the gist of this invention residing in theeinployment'of a zinc compound to supply the essential or active element,.as stated, in a discharge.

I claim 1. The herein described process of producing cloth having patterns on aniline-black grounds, which consists in treating the-cloth with a solution of aniline-black color, drying sufliciently to keep the color from running, and printing the pattern thereon in a discharge containing a zinc compound as its essential or active element, before oxidation of the aniline color, substantially as described.

2; The herein described process of produc- WILLIAM 'I. WI'IITEIIEAD. \Vitnesses:

.JoHN C. EDWARDS,

FREDERICK L. EMERYe 

